LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: David Chinner <dgc@sgi.com>
To: Ferenc Wagner <wferi@niif.hu>
Cc: David Chinner <dgc@sgi.com>, linux-kernel@vger.kernel.org
Subject: Re: inode leak in 2.6.24?
Date: Thu, 21 Feb 2008 08:15:52 +1100	[thread overview]
Message-ID: <20080220211552.GS155407@sgi.com> (raw)
In-Reply-To: <87fxvny9ru.fsf@szonett.ki.iif.hu>

On Wed, Feb 20, 2008 at 03:36:53PM +0100, Ferenc Wagner wrote:
> David Chinner <dgc@sgi.com> writes:
> > The xfs inodes are clearly pinned by the dentry cache, so the issue
> > is dentries, not inodes. What's causing dentries not to be
> > reclaimed?  I can't see anything that cold pin them (e.g. no filp's
> > that would indicate open files being responsible), so my initial
> > thoughts are that memory reclaim may have changed behaviour.
> >
> > I guess the first thing to find out is whether memory pressure
> > results in freeing the dentries. To simulate memory pressure causing
> > slab cache reclaim, can you run:
> >
> > # echo 2 > /proc/sys/vm/drop_caches
> >
> > and see if the number of dentries and inodes drops. If the number
> > goes down significantly, then we aren't leaking dentries and there's
> > been a change in memoy reclaim behaviour. If it stays the same, then
> > we probably are leaking dentries....
> 
> Hi Dave,
> 
> Thanks for looking into this.  There's no real conclusion yet: the
> simulated memory pressure sent the numbers down allright, but
> meanwhile it turned out that this is a different case: on this machine
> the increase wasn't a constant growth, but related to the daily
> updatedb job.  I'll reload the original kernel on the original
> machine, and collect the same info if the problem reappers.

Ok, let me know how it goes when you get a chance.

Cheers,

Dave.
-- 
Dave Chinner
Principal Engineer
SGI Australian Software Group

  reply	other threads:[~2008-02-20 21:17 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-15 23:18 Ferenc Wagner
2008-02-18 21:53 ` David Chinner
2008-02-19  0:50   ` Ferenc Wagner
2008-02-19 16:57   ` Ferenc Wagner
2008-02-20  1:04     ` David Chinner
2008-02-20 14:36       ` Ferenc Wagner
2008-02-20 21:15         ` David Chinner [this message]
2008-03-01 15:25           ` Ferenc Wagner

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20080220211552.GS155407@sgi.com \
    --to=dgc@sgi.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=wferi@niif.hu \
    --subject='Re: inode leak in 2.6.24?' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).